OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY4GNAB48130AA

This OEM Carrier draft inducer pressure switch (part HK06WC061, superseded by HK06MB061) is the factory-specified replacement for the Carrier PY4GNAB48130AA packaged gas/electric unit. The pressure switch is a critical safety component that monitors negative pressure created by the inducer motor to confirm it is operating at the correct RPM and establishing proper draft before allowing ignition. When this switch fails, the control board cannot verify safe venting conditions and will lock out the heating sequence entirely — leaving you with a no-heat call.

• Specs: 0.18" W.C. (water column) set point | Normally open (N.O.) configuration | Single-port design | OEM part HK06WC061 / superseded by HK06MB061 | Manufactured by Honeywell for Carrier
• OEM vs Generic: This is a genuine OEM-spec switch calibrated to the exact 0.18" W.C. trip point required by the PY4GNAB48130AA control board. Off-spec generic switches with loose tolerances can cause nuisance lockouts or — more dangerously — allow ignition under improper draft conditions.
• Install Difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, multimeter (to confirm continuity when inducer is running). Label and remove the rubber hose port, swap the switch, confirm continuity at speed before restoring power.
• Warranty: 1-year OEM warranty on parts. In-stock and ships same business day from our warehouse.

Compatibility Note: Direct OEM replacement for Carrier model PY4GNAB48130AA packaged gas/electric unit. Note that HK06WC061 has been superseded by Carrier part number HK06MB061 — both designations reference the same 0.18" W.C. specification and are fulfilled as the current production part. Always verify the W.C. rating printed on your existing switch before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — order today and ship today.